All? Ofcourse not, but the majority, yes. I don't think anybody can support murdering civilians in any conflict.

Israel doesn't celebrate the killing of civilians, but it has become a necessary evil for their own safety.

If Hamas had true concern for its civilians, their militants wouldn't be using them as camouflage. They can use the casualties to muster outrage against Israel and garner support for Hamas. It's a win-win; they're quite ruthless.